I'm a librarian who loves anime, manga, and reading a wide variety of genres.
"'The point is we're closing in on a demon infestation and you don't have the proper knowledge, training or security.' He loomed over me until I had to crane my neck to see his stormy expression. 'You refused you own grandmother's protection. And now you've shunned my efforts to spirit you away from this hellhole until we pursue a dog that may or may not even be inside.'"
Okay, this supernatural hottie that Lizzie is supposed to end up with at some point is pissing me off.
1. She did not know it was a protection potion.
2. No one in this situation has given Lizzie much reason to trust them because they never tell her anything. You can't keep yanking a stranger around and expect blind obedience. And because Lizzie has only just met her grandmother, that's what they are, strangers.
3. The lack of training and knowledge is not Lizzie's fault. Again, no one will tell her anything. Also, maybe the coven should have tried a little harder to find her over the years.
4. Lizzie is worried about the dog, who she has known a lot longer than anyone else in this story. It is perfectly valid for her to want to find him and make sure he's safe. Shut up and help her find the dog.